Attachment for looping-machines.



No. 828,962. PA-TBNTED AUG. 21, 1906.

W. PEARSON.

ATTACHMENT FOR. LOOPING MACHINES. APPLIOATION FILED JULY 25.1905.

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wuvwowo 2F @CDKOZTM flmM JM/M No. 828,962. PATBNTED AUG. 21, 1906."

W. PEARSON. ATTACHMENT FOR LOOPING MACHINES.

2 SHEETSSHEET 2.

APPLICATION FILED JULY 25,1905.

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2 9 g m HIM UNITED PATENT ()FFIGEQ WILLIAM PEARSON, OF JAMISON, PENNSYLVANIA.

ATTACHMENT FOR LOOPING-MACHINES- Specification of Letters Patent. Application fil ed July 25, 1905. SerialNo. 271,160-

NO. 828,962. Patented Aug. 21, 1906.

To all whom, it may concern.-

Be it known that 1, WILLIAM PEARSON, a citizen of the United States, residing at J amison, county of Bucks, State of Pennsylvania, have invented a new and useful Attachment for Looping-Machines, of which the following is a specification.

My invention relates to an improvement in machines for uniting knit fabrics constructed, preferably, according to my prior patent, No. 273,143, dated February 27, 1883; and it consists in a novel construction of an attachment whereby I may form any desired length of loop in the chain by means of which the fabrics are united, thus increasing the elasticity of the seam. I

It further consists in a novel construction adapted to form a loose chain and in which when the thread is drawn from the tension the strain is on two fixed pointsnamely, the looper-hooks and the slackeninghook instead of being on the tension and tensionspring. I

It further consists in novel means for adjusting the slackening-hook.

It further consists of novel features of construction, all as will be hereinafter fully set I I points at one point of its stroke. Fig. 10 represents a perspective view of certain of the parts and showing the needle at its extreme rearward position and the slackening-hook at I its forward position.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, 1 designates the 1 base of the machine, having rising therefrom the standards 2 and 3, in which is mounted a driving-shaft 4. 5 designates an eccentric mounted on the driving-shaft and adapted to actuate the needle-cylinder 6, which is pro- I vided with the impaling-points 7. 8 designates a combined eccentric and cam mounted on said driving-shaft 4 and adapted to coact with the h0okholder 9 to actuate the looperhooks 10 in the usual manner.

11' designates the needlelever, which is actuated by the cam-runner 12 in the ordinary manner, said lever being provided with a needle-bracket 13, in which is secured the needle 14.

15 designates a tension-spring suitably secured to the needle-lever 11, and 16 designates a tension-bracket, by means of which the tension of the thread 17 is adjusted. The thread passes from the bracket 16 under the hook 18, through the eye in the tensionspring 15 to the needle-bracket 13, and thence through the eye of the needle in the ordinary forth and described.

Figure 1 represents a plan view of a portion of a looping-machine, showing an attachment embodying my invention secured thereto.- Fig. 2 represents a perspective I manner. I have deemed it unnecessary to view of Fig. 1. Fig. 3 represents a section on a further describe the construction and operaline :1; 6, Fig. 1. Fig. 4 represents a perspection of the looping-machine, as the same per tive view of my device in detached position. l s@ forms no part of my present invention and Fig. 5 represents a perspective view of a por would be preferably constructed according tion of the machine, showing the position certo my prior patent, to which I have hereintain of the parts assume as the point of the 1 before referred and to which reference may needle is approaching the looper-hooks. Fig. I be had for a detailed description of the con- 6 represents a perspective view similar to struction and operation. Fig. 5, but showing the position certain of the 19 designates a cam adjustably secured to parts assume after the loop has been Ie= the driving-shaft 4 by means of a set-screw or leased by the looper-hooks/but before the equivalent device 20. The operative surface needle has reached its extreme forward posi= of the circumference of the cam 19 begins at tion, Fig, 7 represents a per pec ive View 21 and extends to 22. similar to Fig, 5, but showing the position 23 designates a recess or cut-away portion certain of the parts assume when the needle on oneside of the cam 19. is moving rearwardly and before the slacken- 24 designates a bracket which, as best seen ing-hook has released the thread. Fig. 8 rep in lfig. 4, is provided with the outwardly-exresents a view, partly in section, of a portion tending arms 25, which latter have the of the, device in detached position, showing upwardly-extending portions 26, having an the slackenipgnhook as raised above the nee= opening 27 thercthrough, in which is adaptedv d p F g.- 9 represents a f nt elevato move a rod 28, on which is mounted the tion showing the position the slackening.- I eam -run1 1er29, provided at a suitable point ho k a su e w t re at on to t e imp-cli g l with the faces 30 and 31, said face 30 being adapted to travel on the outer surface of cam 19 and said face 31 being adapted to travel on the side of said cam.

v 32 designates a lug or arm secured to the cam-runner 29, to which a spring 33 is attached, the other end of said spring being secured to a lug 34, secured to the bracket 24 at a suitable point, so that the spring 33 will tend to always keep the faces 30 and 31 of the cam-runner 29 in engagement with the coacting surfaces of the cam 19. 35 designates a bolt having nut 36, whereby said bracket 24 may be secured to any of the looping-machines as now constructed, it being evident that in order to attach my device thereto it will be simply necessary to drill a small hole in the base of the looper and suitably secure my attachment thereto by means of a bolt and nut.

37 designates a block secured to the base of the cam-runner 29 by means of asetscrew 38, which has threaded engagement with said base, said block having an aperture 39 therethrough, in which is retained a slackening-hook 40 by means of a set-screw 41 or equivalent device.

42 designates a set-screw in the block 37, the end of said screw engaging the shank-of the screw 38, and thus preventing the block 37 from rotating with respect to the bracket 29 and also permitting the relation of the slackening-hook and the needle-points 7 to be readily adjusted.

43 designates the fabric to be united, which, as seen in Figs. 1 and 2, is suitably retained on the needle-points, and it will be seen that the slackening-hook 40 always travels between the fabric on the needlepoints and the needle. In Figs. 5, 6, 7, and 10 I illustrate the manner in which the stitch is formed, and for clearness of illustration 1 have not shown the fabric on the needlepoints.

It will be seen that the cam 19 imparts an oscillating motion to the slackening-hook 40.

The operation is as follows: As the drivingshaft 4 revolves the cam 19, secured thereto, Will revolve therewith, it being understood that the driving-shaft is rotated to the right,

as indicated by the arrow, and as the cam 19 rotates and the face 31 of the cam-runner engages the recess 23 the cam-runner 29 and the slackening-hook 40, carried thereby, will be moved forwardly because the spring 33 tends to always hold the faces 30 and 31 of the cam-runner 29 in engagement with the cam 19. Thus it will be plainly seen that the rod 28, on which the cam-runner 29 is mounted, will be moved forwardly or to the left, as seen in Fig. 1, it being understood that as the slackening-hook 40 moves forwardly the needle is moving rearwardly. The operative surface of the cam 19 is so constructed that it causes the slackening-hook as it moves forwardly, owing to the engagement of the face 30 with the the recess21, to be raised above the needlepoints, and as the slackening-hook moves rearwardly or to the right, as seen in Fi 1, owing to saidface 31 passing out of sai recess 23, the slackening-hook 40 will travel directly above and slightly touch the needlepoints between needle-points, it being understood that at this time the needle is moving forwardly toward the fabric. As the slackening-hook moves rearwardly it engages the thread be tween the needle and the fabric and carries it rearwardly or toward the right, as seen in Fig. 2. The slackening-hook 40 remains in this position until the face 31 again engages the recess 23, which will be when the cam 19 has againrotated. The operative surface of the outer face of the cam 19, engaging the face 30 of the cam-runner 29, will cause the cam-runner 29 to be turned on its axis,

40, the amount of this movement depending entirely upon the form of the cam 19. The slackening-hook retains the thread between the needle and the fabric and draws it and holds it to one side, as seen in Fig. 2. The thread instead of being drawn or tightened in the fabric is drawn through the needle from the tension, the slackening-hook 40 and the looper-hooks 10 acting as two fixed points at this time. As the needle passes forwardly toward the fabricthe slackeninghook 40 carries the thread still farther to the rear and remains in this position until the has passed nearly to the extreme end of its rearward stroke. The needle passes through the fabric and through the loop formed by the looper-hooks, and as the needle moves still. farther forwardly the looperhooks are moved to the left in the ordinary mannerand the loop slides from the looperhooks onto the needle, as seen in Fig. 6, the loop now being retained on the needle. .The needle now moves rearwardly, and the looperhooks take the thread from the needle so as to form a loop in the ordinary manner, it being understood that during this rearward movement the thread is. retained on the slackening-hook 40. Before the needle reaches its extreme rearward position the slackening-hook begins to move forwardly, owing and releases the loop which has beenheld thereby during the forward and rearward movement of the needle' After the slackening-hook has released the loop, which it has up to this time retained, said hook passes forwardly above the thread to the position seen in Fig. 10, whichshows the extreme forward position of said hook and the extreme rearward position of the needle. As the needle now moves forwardly the slackeninghook 4O begins to move rearwardly and also lis lowered, so that it slightly touches the the fabric andthe baseof the thereby slightly raising the slackening-hook.

needle has completed its forward stroke andto the face 31 engaging the recess 23,

needle-points between their base and the A on and thebutt of said points laterallyacross fabric impaled thereon and engages the the needle-path, and means for causing said thread between the fabric and the needle before said needle enters the fabric.

I wish to call especial attention to the different adjustments of the slackening-hook. The cam 19 is adjustable on the driving-shaft 4 by means of the set-screw 20. This'will vary the longitudinal movement of the slackening-hook. The forward thrust of the slackening-hook may also be adjusted by means of the set-screw 41. The height of the hook 40 above the needle is adjusted by means of the set-screw 42, which prevents the block 37 from rotating with respect to the bracket 29.

The looping-machine is rendered much more efficient when my device is attached thereto. The strain instead of being on the fabric and the tension-bracket and tensionspring is partly on the slackening-hook and the looper-hook. This will prevent the needle from bending or missing a stitch. By varying the longitudinal movement of the hook 40 the tightness of the chain is correspondingly varied.

While I have shown my novel construction of slackening device as beingpreferably attached to a looping-machine constructed according to my prior patent, it is evident that it may be attached to any of the loopingmachines now on the market.

If my device is attached to a looping-machine in which the needle travels toward the center of the needle-cylinder instead of away from it, as in some of the looping-machines now on the market, it is apparent that the slackening-hook will travel between the fabric and the needle in the same manner as if the forward thrust of said needle were in the opposite direction, it being seen that the slackening-hook always travels between the fabric secured on the needle-points and the needle.

It will be evident that various changes may be made by those skilled in the art which will come within the scope of my in vention, and I do not, therefore, desire to be limited in every instance to the exact construction herein shown and described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a loopingmachine, a looper-hook, means for operating the same, a bracket, a slackening-hook movably supported thereby, means for reciprocating said slackening-hook across the needle-path above the thread and means for causing said slackening-hook to be raised or lowered at a predet said reciprocation.

2. In a device of the character described, ,1 looper-hook, means needle-points, a looper-hook, means for op erating the same, a slackening-hook, means for reciprocating said slackening-hook above said needle-points between the fabric therel l l slackening-hook to engage the thread on the rearward stroke of said hook and draw said. thread out of the needle-path and release the thread on the forward stroke of said hook.

3. In a looping-machine, a looper-hook, means for operating the same,a drivin -shaft, a cam mounted thereon, a bracket, a rod loosely mounted in said bracket, a cam-rum ner on said ro'd, a slackening-hook carried by said cam-runner, and moved therebylaterally across the needle-path, and adapted to draw aside the thread at an angle to the needlepath on the rearward strokeof said hook, and means for effecting a rotatable and longitudinal adjustment of said slackening-hook.

4. In a looping-machine, a needle, a drivingshaft, a cam fixed thereto, a slackening hook adapted to be reciprocated by said cam above the needle-points and between the fabric thereon and said needle when the latter is at the rear end of its stroke, and laterally across the needle-path and means for causing said hook to engage the thread. on its rearward stroke and draw it at an angle to the needle-path, and to release the thread on its forward stroke.

5. In a looping-machine, a looper-hook, means for operating the same, a bracket, a cam-runner movably mounted thereon,means for actuating said cam-runner and a slackening-hook carried by said cam-runner and horizontally reciprocated thereby, laterally across the needle-path when the needle is at the rear end of its stroke and adapted to engage the thread between the needle and the fabric and draw the thread out of the needlepath and at an angle thereto in order to form a loose chain therein.

6. In a device of the character described, a looper-hook, means for operating the same, a bracket, a cam-runner movably mounted therein, a block adjustably secured to said cam-runner, a hook secured to said block and movable above the needle-points in a plane parallel therewith and across the path of the needle and adapted to engage the thread so as to form an elastic seam in the fabric, and means for actuating said cam-runner.

7. In a device of the character described, a needle, a bracket, a cam-runner longitudinally movable therein, a block adjustably secured to said cam-runner, a hook carried by said block and adapted to engage the thread on the forward stroke of the needle and release the thread on the rearward stroke of the needle, means for rotatably adjusting said hook erminedpoint in j and means for actuating said cam-runner.

8. In a device of the character described, a for operating the same, a bracket, a cam-runner movably mounted thereon, a block rotatably adjustable on said cam-runner, a slackening-hook longitudinally adjustable on said block, and adapted to form a slack in the chain, and means for actuating said cam-runner.

9. In a looping-machine, a looper-hook, means for operating the same, a bracket, a cam-runner movably mounted therein, a block adjustable on said camrunner, a slackening-hook adjustably secured to said block, a cam fixed to the driving-shaft and coacting with saidcam-runner to actuate said hook, whereby a loose chain is formed.

10. In a loopingmachine, a lo0perh00k, means for operating the same, a drivingshaft, a cam adjustably mounted thereon, a cam-runner suitably mounted and reciprocated by said cam, and a slackening-hook movable laterally across the needlepath, adapted to be bothreciprocated and oscillated by said cam-runner, said hook being adapted to draw the thread to one side of the needlepath and at an angle thereto.

11. In a looping-machine, a looperhook, means for operating the same, a drivingshaft, a cam adjustably secured thereto, a recessin the side of said cam, a cam-surface on the periphery of said cam, a cam-runner, faces thereon adapted to engage said recess and said cam-face, a spring adapted to hold said faces in engagement with the coacting cam-surfaces and a slackening-hook actuated by said cam-runner and moved thereby laterally across the needle-path, carried by said cam-runnerand both rotatably and longitudinally adjustable with respect thereto.

12. In a looping-machine, a looper-hook,

means for operating the same, a drivingshaft, a cam adjustably secured thereto, a recess in the side of said cam, a cam-surface on the periphery of said cam, a cam-runner, faces thereon adapted to engage said recess and said cam-face, a spring adapted to hold said cam-runner in engagement with said cam, a bracket secured to the looping-machine, a rod movably mounted in said bracket and on which said cam-runner is fixedly mounted, a block adjustably secured tosaid cam-runner, and a slackening-hook adjustably secured to said block.

13. In a device of the character described,

a base, a bracket secured thereto, a rod movably carried by said bracket, a cam-runner mounted on said rod, means for actuating said cam-runner, a spring secured to said cam-runner, and to said bracket adapted to hold said cam-runner in engagement with its actuating means, a block adjustably secured to said cam-runner, a hook adjustable in said block, and moved thereby across the thread between the butts of the impaling-points and the fabric thereon.

14. In a looping-machine, a looperhook, means for operating the same, a base, standards rising therefrom, a driving-shaft journaled in said standards, a cam adjustably mounted on said shaft between said standards, a bracket secured to said base, a rod movably carried by said bracket, a cam-runner mounted on said rod and actuated by said cam, a spring adapted to hold said cam-runner in engagement with said cam, a slackening-hook adjustably carried by said cam-runner and reciprocated thereby, means for lowering said hook to engage the thread on its rearward stroke, and means for raising said hook to release said thread on its forward stroke.

15. In a device of the character described,

a needle-lever suitably actuated, a needle carried thereby, a bracket, a slackening-hook movably carried thereby, means for moving said hook laterally of the needle-path to draw the thread rearwardly between the needle and the fabric when the latter is at the rear end of its stroke, means for maintaining said slackening-hook in its rearward position during the forward thrust of the needle and means for raising and moving forwardly said hook to release the thread as the needle is moving rearwardly.

16. In a device of the character described, a looper-hook, means for operating the same, a driving-shaft, a cam adjustably mounted thereon, and having a cam-face on its side and a cam-face on its periphery, a cam-runner adjustably mounted and having faces adapted to coact with the cam-faces on said cam, a slackening-hook carried by said camrunner and moved thereby laterally across the needle-path and means for rotatably and longitudinally adjusting said slackeninghook.

17. In a slackenin device for looping-machines, a looper-hoo means for operating the same, a bracket, a rod loosely mounted thereon, a cam-runner adjustably mounted on said rod, a block, a bolt passing therethrough and having threaded engagement with said cam-runner, the end of said screw engaging said rod, a screw engagement with said block, the end of said screw en aging said bolt, a slackening-hook adjustab l y carried by said block adapted to form a loose seam in the fabric and means for actuating said cam-runner.

18. In a looping-machine, a slackeninghook, needle-points, a needle, means for reciprocating said needle above said needlepoints and between the fabric thereon and said needle when the latter is at the rear end of its stroke, and laterally across the needlepath and means for causing said hook to engage the thread on its rearward stroke and draw it at an angle to the needle-path and to release the thread on its forward stroke.

' WILLIAM PEARSON.

Witnesses:

E. B. Mourns, H. S. FAIRBANKS.

having threaded 

